Scientist: Log is the basis of the pH and Richter scales

Mathematician: Log is the integral of $\frac{1}{x}$

Programmer: A log is generated by a program to help in debugging

Lumberjack: Logs are what keep my buisness running

IT professor: There are two types of log: log in and log out

Camper: Logs are used to make campfires

There are clearly two types of log: a plaintext log, call a *plog*; and a binary log, called a *blog*